Accelerator for hot-water heating systems



July 24, 1923. 11,462,768

, e, H. RUSSELL ACCELERATOR FOR HOT WATER HEATING SYSTEMS J Filed Aug. 14, 1920 1 Z4 5 Z2 M 1/ Patented July 24, 1923.

lTED STATES P A E ACCELERATOR FOR HOT-WATER HEATING SYSTEMS.

Application filed August 14, 1920. Serial No. 403,590.

T 0 all whom it may concern:

Be it known that I, GEORGE H. RUSSELL, a citizen of the United States, residing at Florence, in the county of Lauderdale and State of Alabama, have invented a new and useful Accelerator for Hot-Water Heating Systems, of which the following is a specification.

The present invention appertains to an accelerator for hot water heating systems. and aims to provide a novel and improved device for accelerating or facilitating the circulation of the water through the system by preventing the water in the system from expanding and boiling over before a predetermined pressure has been reached, so that the water in the system may be maintained at a temperature above the boiling point without boiling over and discharging through the overflow pipe, and whereby an even pressure of say from eight to twelve The object of the invention is to provide a device which is adapted to be interposed in the expansion pipe at any point between the boiler and expansion tank, and which incorporates a check valve for allowing the water to flow from the expansion tank downwardly through the expansion pipe for filling the system. said valve being automatically closed when the system is filled, and the device also including a relief or safety valve which may be set to open at any desired pressure. allows the water to escape upwardly into the expansion tank when the pressure of the water reaches a predetermined number of pounds. whereby the circulation of the water is accelerated and a normal low pressure maintained.

It is also within the scope of the invention to provide a device of the nature indicated having the features above noted. and which at the same time. is com aratively simple. compact and inexpensive n construction, as well as being readily installed in a hot water heating system. and bein thoroughly practical and eflicient in operation.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed. it being understood that changes in the precise embodiment of the invention herein disclosed can be made withm the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein Figure 1 is a vertical section of the device.

Figure 2 is a sectional detail taken on the line 2-2 of Figure 1.

In the drawing, the device is disclosed as being disposed between the upper end of the expansion pipe 7 and the expansion tank 2, although it is to be understood that the device may be interposed in the expansion pipe at any suitable point between the boiler and expansion tank.

In carrying out the invention, there is provided an upright or vertical pipe 1 having its upper end engaged through the bottom of the expansion tank 2, this tank 2 being provided with a float controlled water inlet valve 3 which is connected to a suitable water supply pipe (not shown), and the tank 2 is' further provided with an-overflow pipe 4. Thepipe 1 has its lower end bent to one side and upwardly as at 5. The de vice embodies a second upright or vertical pipe 6 disposed at one side of and parallel with the pipe 1. and having its lower end attached to the upper end of the expansion pipe 7 which extends downwardly to the boiler (not shown). The upper end portion of the pipe 6 is curved to one side and downwardly to overhang the lower end of the pipe 1, as at 8. The adiacent ends or bends 5 and 8, respectively, of the pipes 1 and 6 are conected by a coupling or valve casing 9.

The coupling or sleeve 9 is provided with an inner annular rib or flange 10 providing a restricted opening 11, and an upwardly facing concaved valve seat 12. The coupling 9 also has a spider 13 within its lower end. A valve stem 14 is slidable through the hub of the spider 13 to be guided for vertical reciprocatory movement thereby. and the stem 14 projects loosely through the opening 11 and has a hemispherical valve 15 upon its upper end which is adapted to rest upon the seat 12 to provide a check valve. The other or lower end of the stem 14 has a knob or head 16 adapted to limit the movement of. the valve 15 when unseat ing, since the knob 16 is arranged to strike the spider 13.

An upstanding tubular valve casing 17 has its lower end threadedly or otherwise detachably engaged to the top of the bend 8 of thepipe 6," and the lower endof the tubular casing 17 has" an inturned annular flange 18 providing a restricted opening or aperture 19 and an upwardly tac ng concaved valve seat 20. A. cap 21 is threadedly portion ofthe casing 17 and is apertured for'the'reception'of the upper end of'a valve stem 24. The valve stem 24 has a hernispherical valv 25 at it's'lowe'r end which is arrangedto' bear uponthe seat 20' fornormally closing the opening-19. A coiled wire expansion" spring26 is disposed upon the stein24sbetween the 1ug'23 and the valve 25" forinor'm ally seating the valve 25.

- It willthus beseen that the present device forms a portion of the expansion pipe or conduit, and is of approximately S-shape' 1 w th one bend pro ect ng downwardly and the other bend projecting up y a with one end' connected to the expansion tank the" other end projecting downwardly and attached to the expansion pipe. ThisS-shap'ed conduit is provided with a check valve between its bends whereby the said check'valve' allows the water to flow downwardly from the expansion tank through: the expansion pipe, but prevents thewater flowing upwardly past the check valve: The by-pfa'ss connects the upward bend 8 of the S-Shaped conduit and' the up-i wardlyproje cting'pipe or end portion 1 of the saidconduit, and this hy-pass is normally closedby the spring seated relief or safety valve 25.

In operation, the expansion" tank 2 is always partially fill'edwith water due to the fact that when the water level lowers within This maintains the water level within the expansion tank approxin ately uniform, and any excessive water within the expansion tank overflows down through the overflow pipe 4; ater will therefore flow downwardlythrough' the pipes 1, 6 and 7 from the expansion tank 2, and the downward flow of water will iinseat the check valve 15. The hot water circulating system is thcre'-' fore".a utornatically filled with water, and when. the system is filled, the check valve 15 will seat lay-gravity to close the opening I1. The. valve 25 may be" set by adjusting the plug 23" to open at any desired pressure. Whe'nth'e water is heated and expands to the desired pressnf'e, therelief or safety valve 25 will be opened, and the excessive pressure will be relieved, since the water can flow through the casing 17 and by-pass tube 22 upwardly into the expansion tank 2. In this manner, wheflthe pressure of the hot water overcomes the tension of the spring 26, the relief valve 25 is opened or unseated, to allow the water to flow through the bypass past the check valve upwardly into the expansion tank. As soon as the pressure within the system is reduced to normal, the relief valve will be seated under the influence of its spring. The pressure of. the water is thus maintained normal.'

By adjusting'the plug 23. the tension of the spring 26 may be adjusted, whereby the relief valve will open under various pres-- sures, as desired.

The present deviceserves circulation within the system, and also provides for" an even or constant pressure, whereby theheatinq' efficiency of the low pressure system'will be'increased materially.

The componentparts of the device are detachably connected whereby they may be readily separated for purpose of cleaning,

repair of replacementQa-nd various -imetals or other materials may be employed in the construction of the various parts; The

valves may be constructed of metal, fibre,

rubber, composition, or any other material suited for the purposes.

Having thus described the invention, what is claimed as new is: In a device of the character described. pipe'having bend at one end, a second pipe having a bend at one .endwa valveeasing connecting said ends of'said'pipes and having" a valve seat-therein, a check valve seatable against said valve seat to close the passage through said casing, valve casing attached to the bend of the second mentioned pipe and having a val've'seat therein,- a by? pass tube connecting'the'second mentionedvalve casing and the; first mentioned pipe to allow the water to flow through the lay-pass tube past the check valve, and a spring pressed" valvewithinthe second mentioned valvecasing and seatable against thevalve seat thereof'to' normally prevent the flow of water from the second pipe through the by pass tube. I 4 v 1 1 In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses;

Witnesses: i

Mrs. E.- S. 'PALMER, ELLA DAVIS.

to accelerate the 

